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Electronics - Magnetism and Electromagnetism

Exercise : Magnetism and Electromagnetism - General Questions
11.
Which two values are plotted on a B-H curve graph?
Reluctance and flux density
Permeability and reluctance
Magnetizing force and permeability
Flux density and magnetizing force
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Which electromagnetic device has a flexible cone?
A speaker
A dc generator
A relay
A solenoid
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
What is the reluctance of a material that has a length of 0.045 m, a cross-sectional area of 0.015 m2, and a permeability of 2500 µWb/At·m?
833.33 µAt/Wb
0.27 At/Wb
1200 At/Wb
More information is needed in order to find the reluctance.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The unit of flux density is known as
magnetomotive force
a weber
a maxwell
a tesla
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
What do you call the characteristic of a magnetic material whereby a change in magnetization lags the application of a magnetizing force?
Hysteresis
Induction
Retentivity
Reluctance
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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